energy change的意思|示意

Energy Change

Energy change, or enthalpy change, is a term used in chemistry to describe the interaction between two substances. When two substances interact, the energy of one or both substances will change. These energy changes are described with the term “enthalpy change.”

The energy change between two reactants is usually measured in terms of kilojoules per mole (kJ/mol). This measurement can be used to compare the energy of one reaction to another, or to compare how much energy is released or absorbed in a given reaction.

When two substances interact, the energy can increase, decrease, or remain the same depending on the type of reaction taking place between the two. If the two substances react and form a new substance, the energy is usually released. This is known as an exothermic reaction. On the other hand, an endothermic reaction is one in which energy is absorbed in the reaction.

Enthalpy change can also be used to compare the energy change between two different reactions. For example, if a reaction releases more energy than another, it is said to have a higher enthalpy change. Likewise, if a reaction absorbs more energy than another, it is said to have a lower enthalpy change.

Energy changes are an important part of studying how chemical reactions work. Knowing the enthalpy change of a reaction can help scientists understand how much energy is released or absorbed in a reaction and what types of products might form. It is also useful in predicting how a reaction will behave under different conditions and temperatures.